Question

A line contains the points a(-9,y) and b(-7,-2) find the value of y so the line has a slope of -3

Answer 1

Answer:

y = -8

Step-by-step explanation:

To find the value for y, use the slope formula:

$m = \frac{y_2-y_1}{x_2-x_1}$

Substitute m = 3 and (-9,y) and (-7,-2).

$-3 = \frac{y--2}{-7--9} \\\\-3 = \frac{y+2}{-7+9}\\\\ -3 = \frac{y+2}{2}\\\\-6 = y + 2\\\\-8 = y$